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Dave Whitmer, Agricultural Commissioner/Sealer

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

EUROPEAN GRAPEVINE MOTH (EGVM)

Status Report on EGVM within Napa County January 17, 2010

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County First confirmed detection: September 29, 2009 Total larval specimens Lobesia sp. positive: 30 Total larval properties Lobesia sp. positives: 23 Total adult EGVM Lobesia botrana found: EGVM Presentation

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Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Distribution of finds

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County Known geographic distribution within Napa County: Primarily Oakville/Rutherford area Zinfandel Lane, south of St. Helena Third Avenue, east of Napa Total detection traps deployed (10/7-26/2009): 250

Number of trap servings prior to winter: 3 Total adult EGVM Lobesia botrana found: EGVM Presentation

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Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Delimitation Trapping

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Life Stages

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Botrytis Begins…

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Almost Completely Botrytized…

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

Best Way to Dispose of Infested Crop

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

And in Reds…

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

And in Reds… …premature shrivel and entry holes in berries

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

A Closer Look

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County

A Closer Look

EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County Potential Distribution in the U.S.

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County • What’s Happening Right Now? – Regulatory program is being developed and will closely mirror LBAM quarantine requirements – Determining extent of infestation through delimitation trapping (budbreak early to mid March) – Working with USDA/CDFA to get quality information and develop strategy well before Spring – Technical Working Group (area under quarantine, eradication, trap denisties, monitoring, degree day model, treatment, area wide mating disruption, etc.) – Working with USDA (SITC) to identify how EGVM got to Napa County

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County • Challenge is developing and implementing action steps which are dependent on recommendations of Technical Working Group (TWG) • Statewide Survey being planned for all grape growing areas in California (25 traps per sq. mi.)

Dave Whitmer, Agricultural Commissioner/Sealer

European Grapevine Moth in Napa County • Growers are asked to become educated about EGVM biology, including: – Life stages (eggs, larvae, pupae, adults) – Feeding behavior and damage on grapevines • Flower (individual developing flowers and berries; larval nests) • Fruit (individual berries, webbing in clusters, bunch rot)

• Become familiar with pest management strategies, monitor vineyards, regularly check for email alerts and visit County/UC website for treatment timing • Comply with all applicable quarantine and compliance agreement requirements to prevent artificial spread and allow harvested winegrapes to be moved for processing